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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Asthma-II: Pathophysiology and Classification01:26

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Updated: Feb 17, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Gene expression analysis in asthma using a targeted multiplex array.

Christopher D Pascoe1,2,3, Ma'en Obeidat4,5, Bryna A Arsenault4,5

  • 1UBC Institute for Heart Lung Health, St. Paul's Hospital, 1081 Burrard St, Vancouver, BC, Canada. cpascoe@chrim.ca.

BMC Pulmonary Medicine
|December 13, 2017
PubMed
Summary
This summary is machine-generated.

Asthma involves airway gene expression changes, particularly in cell interactions and barrier function. Altered binding sites for the transcriptional regulator CTCF may drive these gene expression changes, offering new therapeutic insights.

Keywords:
AsthmaCTCFCo-expressionEpitheliumExtracellular matrixNanostringRemodelingSmooth muscleTargeted expression

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Area of Science:

  • Pulmonary Medicine
  • Genetics
  • Immunology

Background:

  • Airway structural cell gene expression changes are implicated in asthma development and hyperresponsiveness.
  • Specific genes related to smooth muscle contraction and epithelial barrier integrity are affected.
  • Targeted gene expression arrays were employed to identify key genes in asthma pathology.

Purpose of the Study:

  • To identify differential gene expression and co-expression patterns in asthmatic airways.
  • To investigate the role of specific genes in asthma pathophysiology.
  • To explore the potential involvement of transcriptional regulators in asthma.

Main Methods:

  • RNA isolation from airways of asthma patients and non-asthmatic controls.
  • Multiplexed gene expression analysis using a hypothesis-directed platform.
  • Grouping genes by function: smooth muscle contraction, cytoskeleton, epithelial barrier, immunity, fibrosis, and epigenetics.

Main Results:

  • Significantly decreased integrin beta 6 and Ras-Related C3 Botulinum Toxin Substrate 1 (RAC1) in asthmatic airways, impacting barrier function.
  • Significantly elevated Collagen Type 1 Alpha 1 (COL1A1) and COL3A1 levels, associated with proliferation and inflammation.
  • Identified differential co-expression patterns linked to virus recognition and interferon regulation, with 7/8 pairs containing CCCTC-binding factor (CTCF) motifs.

Conclusions:

  • Altered cell-cell and cell-matrix interaction genes are crucial for asthma inflammation and remodeling.
  • Changes in CCCTC-binding factor (CTCF) binding sites may drive asthma-related gene expression.
  • Understanding CTCF's role could enhance asthma pathophysiology knowledge and therapeutic strategies.